package com.gl.emms.whale.util;


import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import com.gl.emms.whale.R;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;

public class UpdateManager {

	private Context mContext;

	//提示语
	private String updateMsg = "有最新的软件包哦，亲快下载吧~";

	//返回的安装包url
	private String apkUrl = "http://ganlinux.eicp.net:8080/Whale.apk";


	private Dialog noticeDialog;

	private Dialog downloadDialog;
	/* 下载包安装路径 */
	private static final String savePath = "/sdcard/updatedemo/";

	private static final String saveFileName = savePath + "Whale.apk";

	/* 进度条与通知ui刷新的handler和msg常量 */
	private ProgressBar mProgress;


	private static final int DOWN_UPDATE = 1;

	private static final int DOWN_OVER = 2;

	private int progress;

	private Thread downLoadThread;

	private boolean interceptFlag = false;

	private Handler mHandler = new Handler(){
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case DOWN_UPDATE:
				mProgress.setProgress(progress);
				break;
			case DOWN_OVER:

				installApk();
				break;
			default:
				break;
			}
		};
	};

	public UpdateManager(Context context) {
		this.mContext = context;
	}

	//外部接口让主Activity调用
	public void checkUpdateInfo(){
		showNoticeDialog();
	}


	private void showNoticeDialog(){
		AlertDialog.Builder builder = new Builder(mContext);
		builder.setTitle("软件版本更新");
		builder.setMessage(updateMsg);
		builder.setCancelable(false);
		builder.setPositiveButton("下载", new OnClickListener() {			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				interceptFlag = false;
				dialog.dismiss();
				showDownloadDialog();			
			}
		});
		builder.setNegativeButton("以后再说", new OnClickListener() {			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();				
			}
		});
		noticeDialog = builder.create();
		noticeDialog.show();
	}

	private void showDownloadDialog(){
		AlertDialog.Builder builder = new Builder(mContext);
		builder.setTitle("软件版本更新");

		final LayoutInflater inflater = LayoutInflater.from(mContext);
		View v = inflater.inflate(R.layout.progress, null);
		mProgress = (ProgressBar)v.findViewById(R.id.progress);

		builder.setView(v);
		builder.setNegativeButton("取消", new OnClickListener() {	
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				interceptFlag = true;
			}
		});
		downloadDialog = builder.create();
		downloadDialog.show();

		downloadApk();
	}

	private Runnable mdownApkRunnable = new Runnable() {	
		@Override
		public void run() {
			/*
			try {
				URL url = new URL(apkUrl);

				HttpURLConnection conn = (HttpURLConnection)url.openConnection();
				conn.connect();
				int length = conn.getContentLength();
				InputStream is = conn.getInputStream();

				File file = new File(savePath);
				if(!file.exists()){
					file.mkdir();
				}
				String apkFile = saveFileName;
				File ApkFile = new File(apkFile);
				FileOutputStream fos = new FileOutputStream(ApkFile);

				int count = 0;
				byte buf[] = new byte[1024];

				do{   		   		
		    		int numread = is.read(buf);
		    		count += numread;
		    	    progress =(int)(((float)count / length) * 100);
		    	    //更新进度
		    	    mHandler.sendEmptyMessage(DOWN_UPDATE);
		    		if(numread <= 0){	
		    			//下载完成通知安装
		    			mHandler.sendEmptyMessage(DOWN_OVER);
		    			break;
		    		}
		    		fos.write(buf,0,numread);
		    	}while(!interceptFlag);//点击取消就停止下载.

				fos.close();
				is.close();
				conn.disconnect();
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch(IOException e){
				e.printStackTrace();
			}
			 */
			try {
				URL url = new URL(apkUrl); 
				HttpURLConnection conn = (HttpURLConnection) url 
						.openConnection(); 
				conn.setConnectTimeout(5*1000);
				conn.connect(); 
				int length = conn.getContentLength(); 
				Log.v("whale", "总字节数:"+length); 
				InputStream is = conn.getInputStream(); 
				File file = new File(savePath); 
				if (!file.exists()) { 
					file.mkdir(); 
				} 
				File apkFile = new File(saveFileName); 
				FileOutputStream out = new FileOutputStream(apkFile); 
				int count = 0; 
				int readnum = 0; 
				byte[] buffer = new byte[1024]; 
				do { 
					readnum = is.read(buffer); 
					count += readnum; 
					progress = (int) (((float) count / length) * 100); 
					Log.v("whale", "下载进度"+progress); 
					mHandler.sendEmptyMessage(DOWN_UPDATE); 
					if (readnum <= 0) { 
						// 下载结束 
						mHandler.sendEmptyMessage(DOWN_OVER); 
						break; 
					} 
					out.write(buffer,0,readnum); 
				} while (!interceptFlag); 
				is.close(); 
				out.close(); 
			} catch (MalformedURLException e) { 
				e.printStackTrace(); 
			} catch (IOException e) { 
				e.printStackTrace(); 
			}

		}
	};

	/**
	 * 下载apk
	 * @param url
	 */

	private void downloadApk(){
		downLoadThread = new Thread(mdownApkRunnable);
		downLoadThread.start();
	}
	/**
	 * 安装apk
	 * @param url
	 */
	private void installApk(){
		File apkfile = new File(saveFileName);
		if (!apkfile.exists()) {
			return;
		}    
		Intent i = new Intent(Intent.ACTION_VIEW);
		i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive"); 
		mContext.startActivity(i);

	}
	
}
